2101400320 has 72 divisors (see below), whose sum is σ = 5207171760. Its totient is φ = 811560960.

The previous prime is 2101400309. The next prime is 2101400341. The reversal of 2101400320 is 230041012.

It is a super-2 number, since 2×2101400320² = 8831766609792204800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2101400320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8815 + ... + 65425.

It is an arithmetic number, because the mean of its divisors is an integer number (72321830).

Almost surely, 2^2101400320 is an apocalyptic number.

2101400320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101400320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2603585880).

2101400320 is an abundant number, since it is smaller than the sum of its proper divisors (3105771440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101400320 is an equidigital number, since it uses as much as digits as its factorization.

2101400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56661 (or 56647 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2101400320 is about 45841.0331471707. The cubic root of 2101400320 is about 1280.8637399366.

Adding to 2101400320 its reverse (230041012), we get a palindrome (2331441332).

The spelling of 2101400320 in words is "two billion, one hundred one million, four hundred thousand, three hundred twenty".